Much as this angers me, I can't help but wonder if it might not be useful in the long run. Anger stems from seeing "our" government executing a plot to elect itself a replacement citizenry, because that's exactly what this is. But then I remind myself that the USA as we have known it is already dead. The apparatus of state continues to grind on from the substantial momentum built up by our many generations of prosperity, but make no mistake, the engine is already out of commission. If they think they can replace us with Mexico's population and continue to have anything close to a preeminent world economy, they're only fooling themselves.
Balkanization is this country's future. At this point, I accept (welcome is too strong a word) anything that promotes balkanization of this country into regional and local enclaves, ethnicity being the major fault line. What must happen is for the white man to finally develop an explicitly ethnic mindset, just like the minoritahs have. The social and economic strife caused by a porous border can be exploited to that end.
If this outrage can be exploited to get white people in this country pissed off, then it will bear fruit later. It's all somewhat easier to digest when you admit to yourself that America is already finished. This can be useful fodder for agitation and radicalization.